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linux/net/ipv4
Eric Dumazet 802e12ff9c inet: frags: delay fqdir_free_fn()
fqdir_free_fn() is using very expensive rcu_barrier()

When one netns is dismantled, we often call fqdir_exit()
multiple times, typically lauching fqdir_free_fn() twice.

Delaying by one second fqdir_free_fn() helps to reduce
the number of rcu_barrier() calls, and lock contention
on rcu_state.barrier_mutex.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2024-04-08 10:59:56 +01:00
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